Technical Documentation

bfd-liveness-detection

Syntax

bfd-liveness-detection {authentication {algorithm algorithm-name;key-chain key-chain-name;loose-check;}detection-time {threshold milliseconds;}holddown-interval milliseconds;local-address ip-address;minimum-interval milliseconds;minimum-receive-interval milliseconds;minimum-receive-ttl number;multiplier number;neighbor address;no-adaptation;transmit-interval {threshold milliseconds;minimum-interval milliseconds;}version (1 | automatic);}

Hierarchy Level

[edit logical-systems logical-system-name routing-instances routing-instance-name routing-options rib routing-table-name static route destination-prefix],[edit logical-systems logical-system-name routing-instances routing-instance-name routing-options rib routing-table-name static route destination-prefix qualified-next-hop (interface-name | address)],[edit logical-systems logical-system-name routing-instances routing-instance-name routing-options static route destination-prefix],[edit logical-systems logical-system-name routing-instances routing-instance-name routing-options static route destination-prefix qualified-next-hop (interface-name | address)],[edit logical-systems logical-system-name routing-options rib routing-table-name static route destination-prefix],[edit logical-systems logical-system-name routing-options rib routing-table-name static route destination-prefix qualified-next-hop (interface-name | address)],[edit logical-systems logical-system-name routing-options static route destination-prefix],[edit logical-systems logical-system-name routing-options static route destination-prefix qualified-next-hop (interface-name | address)],[edit routing-instances routing-instance-name routing-options rib routing-table-name static route destination-prefix],[edit routing-instances routing-instance-name routing-options rib routing-table-name static route destination-prefix qualified-next-hop (interface-name | address)],[edit routing-instances routing-instance-name routing-options static route destination-prefix qualified-next-hop (interface-name | address)],[edit routing-instances routing-instance-name routing-options static route destination-prefix],[edit routing-options rib routing-table-name static route destination-prefix],[edit routing-options rib routing-table-name static route destination-prefix qualified-next-hop (interface-name | address)],[edit routing-options static route destination-prefix],[edit routing-options static route destination-prefix qualified-next-hop (interface-name | address)]

Release Information

Statement introduced before JUNOS Release 7.4.

detection-time threshold and transmit-interval threshold options introduced in JUNOS Release 8.2.

local-address statement introduced in JUNOS Release 8.2.

minimum-receive-ttl statement introduced in JUNOS Release 8.2.

Support for logical routers introduced in JUNOS Release 8.3.

holddown-interval statement introduced in JUNOS Release 8.5.

no-adaptation statement introduced in JUNOS Release 9.0.

Support for IPv6 static routes introduced in JUNOS Release 9.1.

authentication algorithm, authentication key-chain, and authentication loose-check statements introduced in JUNOS Release 9.6.

Description

Configure bidirectional failure detection timers and authentication criteria for static routes.

Options

authentication algorithm algorithm-name —Configure the algorithm used to authenticate the specified BFD session: simple-password, keyed-md5, keyed-sha-1, meticulous-keyed-md5, or meticulous-keyed-sha-1.

authentication key-chain key-chain-name—Associate a security key with the specified BFD session using the name of the security keychain. The name you specify must match one of the keychains configured in the authentication-key-chains key-chain statement at the [edit security] hierarchy level.

authentication loose-check—(Optional) Configure loose authentication checking on the BFD session. Use only for transitional periods when authentication may not be configured at both ends of the BFD session.

detection-time threshold milliseconds—Configure a threshold. When the Bidirectional Forwarding Detection (BFD) protocol session detection time adapts to a value equal to or greater than the threshold, a single trap and a single system log message are sent.

holddown-interval milliseconds—Configure an interval specifying how long a BFD session must remain up before a state change notification is sent.

Range: 0 through 255,000
Default: 0

local-address ip-address—Enable a multihop BFD session and configure the source address for the BFD session.

minimum-interval milliseconds—Configure the minimum intervals at which the local routing device transmits a hello packet and then expects to receive a reply from the neighbor with which it has established a BFD session.

Range: 1 through 255,000

minimum-receive-interval milliseconds—Configure the minimum interval at which the local routing device expects to receive a reply from a neighbor with which it has established a BFD session.

Range: 1 through 255,000

minimum-receive-ttl number—Configure the time-to-live (TTL) for the multihop BFD session.

Range: 1 through 255
Default: 255

multiplier number—Configure number of hello packets not received by the neighbor that causes the originating interface to be declared down.

Range: 1 through 255
Default: 3

neighbor address—Configure a next-hop address for the BFD session for a next hop specified as an interface name.

no-adaptation—Specify for BFD sessions not to adapt to changing network conditions. We recommend that you not disable BFD adaptation unless it is preferable not to have BFD adaptation enabled in your network.

transmit-interval threshold milliseconds—Configure a threshold. When the BFD session transmit interval adapts to a value greater than the threshold, a single trap and a single system log message are sent. The interval threshold must be greater than the minimum transmit interval.

Range: 0 through 4,294,967,295

transmit-interval minimum-interval milliseconds—Configure the minimum interval at which the local routing device transmits hello packets to a neighbor with which it has established a BFD session.

Range: 1 through 255,000

version—Configure the BFD protocol version to detect.

Range: 1 or automatic
Default: automatic (autodetect the BFD protocol version)

The remaining statements are explained separately.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.


Published: 2010-04-14